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Exposure Fixture

Publishing Venue

IBM

Related People

Milligan, RM: AUTHOR

Abstract

Exposure fixture 10, drawing A, is used for forming the storage elements of magnetic memory wires. Fixture 10 has flat plate members 10a and 10b. Each member 10a and 10b has formed through it plural slit-like elongated parallel openings or transparent windows 11 as at B. Openings 11 are transverse to plural semicircular parallel channels or grooves 12 formed in the opposing inner faces of members 10a and 10b. The latter are assembled to each other by screws 13. When so assembled, each opening 11 of member 10a is in mutual exclusive aligned relationship with a corresponding opening of member 10b. Also, each groove 12 of member 10a is in mutual exclusive alignment with a corresponding groove of member 10b.

Country

United States

Language

English (United States)

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Exposure Fixture

Exposure fixture 10, drawing A, is used for forming the storage elements of
magnetic memory wires. Fixture 10 has flat plate members 10a and 10b. Each
member 10a and 10b has formed through it plural slit-like elongated parallel
openings or transparent windows 11 as at B. Openings 11 are transverse to
plural semicircular parallel channels or grooves 12 formed in the opposing inner
faces of members 10a and 10b. The latter are assembled to each other by
screws 13. When so assembled, each opening 11 of member 10a is in mutual
exclusive aligned relationship with a corresponding opening of member 10b.
Also, each groove 12 of member 10a is in mutual exclusive alignment with a
corresponding groove of member 10b.

With members 10a and 10b unassembled, an unexposed photoresist coated
magnetic memory wire is inserted in each channel of member 10b. The radii of
the semicircular cross-section of grooves 12 are compatible to the radii of the
wires. Next, member 10a is assembled to member 10b by screws 13. As a
result, each wire is completely enclosed and, hence, masked by members 10a
and 10b except for those portions of the wire which are adjacent to openings 11.
Next, the assembled 10 fixture is inserted into a light box enclosure not shown.
There fixture 10 is illuminated in the box thus exposing those portions of the
photoresist coatings of the wires not masked by openings 11. Then the fixture 10
is disassembled and the wires removed. The wires are next subj...